Lovato HS1B6NT090D024 is a single-phase 90 A solid state relay with a 3.5–32 V DC control input, 24–600 V AC rated operating voltage, SCR output and zero-crossing switching for industrial resistive loads.
£77.21
The Lovato HS1B6NT090D024 is a high-capacity single-phase 90 A solid state relay designed for reliable electronic switching of AC resistive loads. Part of the Lovato HS1B series, its compact hockey-puck construction uses an SCR semiconductor output to deliver silent, contactless switching for demanding industrial heating and automation applications.
The HS1B6NT090D024 accepts a 3.5–32 V DC control input and switches loads across a rated operating voltage range of 24–600 V AC. Its zero-crossing switching operates close to the AC waveform's zero-voltage point, helping minimise switching disturbances when controlling compatible resistive loads.
Rated for 90 A AC-51 at 40 °C and 80 A AC-51 at 55 °C, this relay provides substantial switching capacity when correctly installed and cooled. A 1200 V blocking voltage, high electrical isolation and integrated TVS output protection support dependable operation in industrial control systems.
The Lovato HS1B6NT090D024 switches AC loads electronically through an SCR semiconductor output, eliminating the mechanical contacts used by conventional electromechanical relays. This contactless design provides quiet operation and makes the relay particularly suitable for applications involving frequent switching of high-current resistive loads.
Its zero-crossing switching, 1200 V blocking voltage and 1200 A surge peak capability provide robust switching performance for compatible AC loads. Correct thermal management is essential at high currents, with Lovato specifying a heatsink thermal resistance of ≤0.3 K/W when operating at the stated AC-51 rated-current conditions.
| HS Code | 85365003 |
|---|---|
| Manufacturer | Lovato Electric |
| Series | HS1B Solid State Relays |
| Model | HS1B6NT090D024 |
| Product type | Solid state relay |
| Configuration | Single-phase |
| Number of poles | 1 |
| Housing format | Hockey puck |
| Control voltage | 3.5–32 V DC |
| Operating pick-up voltage | 3.5 V |
| Operating drop-out voltage | 2 V |
| Input current | 10–13 mA |
| Input reverse voltage | 32 V |
| Static output type | SCR (silicon controlled rectifier) |
| Switching mode | Zero crossing |
| Rated operating voltage | 24–600 V AC |
| Blocking voltage | 1200 V |
| Operational frequency | 45–65 Hz |
| Rated operating current AC-51 at 40 °C | 90 A |
| Rated operating current AC-51 at 55 °C | 80 A |
| Minimum operational current | 0.05 A |
| Non-repetitive surge peak current | 1200 A at 10 ms |
| Off-state leakage current | 1 mA |
| On-state output voltage drop | 1.4 V |
| Critical rate of rise of off-state voltage | 500 V/µs |
| Thermal resistance, junction to case | 0.3 K/W |
| Required heatsink thermal resistance at rated AC-51 current | ≤0.3 K/W |
| Input-to-output isolation | 4000 V |
| Input/output-to-metal-base isolation | 4000 V |
| Output protection | TVS |
| I²t | 7200 A²s |
| Control terminals | M4 screw |
| Control terminal tightening torque | 1.2–2 Nm |
| Control conductor size | 0.75–2.5 mm² |
| Load terminals | M5 screw |
| Load terminal tightening torque | 2–3 Nm |
| Load conductor size | 1.5–6 mm² |
| Mounting | Screw fixing |
| Operating position | Any |
| Operating temperature | −55 to +90 °C |
| Storage temperature | −55 to +125 °C |
| Weight | 90 g |
| Package dimensions | 75 × 49 × 38 mm |
| Conformity | IEC/EN/BS 60947-4-3, IEC/EN/BS 60947-4-2, IEC/EN/BS 62314, IEC/EN/BS 60335-1 |
| Certifications | cURus, VDE, CSA |
| EAN | 8013975321652 |
The HS1B6NT090D024 is a single-phase solid state relay designed primarily for electronic switching of AC-51 resistive loads such as industrial electric heaters and heating systems.
The relay is rated at 90 A AC-51 at 40 °C and 80 A AC-51 at 55 °C, subject to correct installation and thermal management.
The HS1B6NT090D024 accepts a 3.5–32 V DC control input, making it suitable for compatible low-voltage electronic and PLC control circuits.
The relay has a rated operating voltage range of 24–600 V AC and an operational frequency range of 45–65 Hz.
Correct thermal management is required for high-current operation. Lovato specifies a heatsink thermal resistance of ≤0.3 K/W for operation at the stated AC-51 rated-current conditions.
Lovato HS series solid state relays provide machine builders, panel manufacturers and automation engineers with robust semiconductor switching solutions for frequent, silent and reliable control of industrial electrical loads.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...